Accession Number : AD1045259


Title :   Coherent Frequency Shifter, Optical Isolator, Lasers on an Integrated Platform for Cold Atom Microsystems


Descriptive Note : Technical Report,07 Jan 2015,22 Jul 2016


Corporate Author : University of California Davis United States


Personal Author(s) : Yoo,S J Ben


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1045259.pdf


Report Date : 11 Oct 2017


Pagination or Media Count : 68


Abstract : This project report summarizes the UC Davis-led Cold Atom Microsystems (CAMS) project that covers progress on coherent frequency shifter, optical isolator, and lasers at 780 nm wavelength. The LiNbO3 based coherent optical frequency shifter worked as a single tone high extinction frequency up shifter/down shifter while it also achieved high extinction optical isolators. The ring laser achieved room temperature cw operations at 780 nm. The summary of the key achievements are as follows: (1) successful experimental demonstration of single tone frequency shifting with extinction 20 dB, (2) experimental demonstration of frequency shifting with continuous sweeping from +/- 2.5 GHz frequency shifts with potential capability to achieve beyond +/- 10 GHz; (3) experimental demonstration achieving frequency shifting with 20 dB optical isolation; (4) experimental demonstration achieving frequency shifting with 10 % leakage; (5)experimental demonstration achieving frequency shifting with 3 dB forward optical loss; (6) 29.3 dBm RF power operation of optical frequency shifter; (7) a new design and theoretical analysis of frequency shifter with larger electro-optical coefficients demonstrating2.85 reduction of required voltage (7.2 power reduction); (8) room temperature cw operation of broad area 780 nm laser fabricated using AlGaAs MQWs bonding wafer stack with InGaP etch stop layer calibrating lasing wavelength and LI-curves; (9) development of AlGaAs active-passive laser fabrication processes including optimized wafer bonding and AlGaAs dry etching recipe; and (10)fabrication of the new 780 nm AlGaAs active-passive integrated laser.


Descriptors :   OPTICAL ISOLATORS , RING LASERS , WAVEGUIDE COUPLERS , ATOMTRONICS


Subject Categories : Optics
      Lasers and Masers


Distribution Statement : APPROVED FOR PUBLIC RELEASE